Frank Lloyd Wright was an American architect known for designing over 1,000 structures in a unique organic style. Some of his most famous works include the Prairie style homes he designed in the early 1900s like the Robie House, which featured horizontal lines, bands of windows, and integration with the landscape. In the 1930s he designed Fallingwater, partially built over a waterfall, and in the late career he pioneered the Usonian home design for affordable houses using new materials like concrete. Wright had a philosophy of organic architecture that embraced nature and simplicity.